Christian bayer



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0. BAYER.

KNOB ATTACHMENT.

No. 593,507. Patented Nov. 9,1897.

' III] WITNESSES: INVENTOR (Zrz'shdn Bayer. d. 9 QQ W g,

ATTORNEYS UNITED STATES PATENT OFFICE.

CHRISTIAN BAYER, OF NEIV YORK, N. Y.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 593,507, dated November 9, 1897. 1

. Application filed December 31,1896- Serial No. 617,630- (N0 odel.)

To (LZZ whom it may concern.-

Be it known that I, CHRISTIAN BAYER, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Knob Attachments, of which the following is a specification.

This invention relates to a door-knob attachment which is capable of being readily applied or detached and which can be easily adjusted for different thicknesses of doors and which when in place is firm or secure, as also of neat appearance: and the invention resides in the novel features of construction set forth in the following specification and claims and illustrated in the annexed drawings, in which- Figure 1 is a sectional side elevation of a door-knob attachment. Fig. 2 is a view like Fig. 1 with parts in a different position than in Fig. 1 and with a modified form of follower. Fig. 3 is a section alongm as, Fig. 1. Fig. 4is a section along y y, Fig. 2. Fig. 5 is a detail view of a key.

In the drawings are shown two door-knobs located, respectively, on opposite sides of door 1, but a description of the attachment of one knob can apply to both. The knob 2 is shown hollow and with its stem 3 screwthreaded or tapped for the engagement of the screw-spindle 4. The knob can be screwed more or less over the spindle, as required by a thinner or thicker door. A follower 5 is shown located in the lock orlatch case 6. This follower 5 or its hub is adapted or threaded-for the engagement of the screwspindle 4, so that the latter unites the knob and follower.

WVhen the knob, spindle, and follower are united or screwed together, a key 7 8, dropped or placed into the grooves 9 and 10 of the knob and spindle and into groove 11 of the follower, locks the parts against independent rotation. The groove 9 is formed in or through the knob stem or shank 3 and the groove 10 is formed in the spindle 4,'and both these grooves 9 and 10 open outwardly, so that the key can be readily dropped or slipped into such grooves. The groove 11 in'the follower 5 opens inwardly and the key part 8 is contracted. The door 1 is cut away at 12, so that,

as seen in Fig. 2, the key 7 8 can be readily removed or replaced. The key when in place in groove 10 has its portion 7 engaging groove 9 and its portion 8 slipped into follower 5 or engaging the groove 11 of such follower. When the key is in place, the rose 13 is slipped up against the door 1 and secured,as by screws or fastenings, at 14. This rose is of such size as to conceal cut or slot 12 and also clasps or surrounds stem 3 to prevent the key 7 8 from coming out of place. To'remove the key 78, the rose 13 is slipped out of the way, as seen in Fig. 2, when the key can be taken out through the cut 12 and the knob unscrewed from the spindle or the latter from the fol lower.

By having the key notched or grooved, as at 15, one or more sections thus formed can be broken off or removed from the key to shorten the latter as required for fitting a narrower door or, in other words, for allowing the knob to be screwed nearer to the follower.

In Fig. 1 the follower 5 is shown in one piece, so as to lock together the two spindles and compel the knobs to turn together.' The follower can, however, be formed of independent sections 5, Fig. 2, allowing the knobs to turn independently, as may be required in some cases-as, for example, front or street doors, where it may be desired to fix the outer knob against turning,while leaving the inner knob free to work.

When the parts are in place, the rose or plate 13 covers the cut 12 and no screw-threads are visible, so that the device looks smooth, neat, and finished, and the knob, spindle, and follower being screwed together and locked by the key are firmly connected, so as not to rattle or work loose.

By having the slot 10 extended through the outer or knob end of spindle 4 such slot 10 can receive key portions 7 of varying length, according as the knob 2 is screwed more or less along the spindle to sit against thinner or thicker doors.

What I claim as new, and desire to secure by Letters Patent, is

1. A knob and follower, combined with a spindle adapted to screw to the knob and follower, and a key, said knob, follower and spindle being slotted for the engagement of the key substantially as described.

2. The combination with aknob and follower, of a spindle screwed to the knob and follower, a key, said knob, follower and spindle being slotted for the engagement of the key, and a rose slidably mounted over said spindle and key and operating to hold said key in the slots of the knob and spindle and operating when moved away from the follower to uncover said slots and permit the removal of the key,substantially as described.

3. A knob and follower, combined with a spindle adapted to screw to the knob and follower, said knob, follower and spindle being slotted for the engagement of a key, and a slidable rose adapted to cover and uncover the grooves or slots of the knob and spindle, said key being notched or sectioned for shortening or breaking off substantially as described.

4. A knob and follower, combined with a spindle adapted to screw to the knob and follower, said knob, follower and spindle being slotted for the engagement of a key, a rose 01' plate for covering the slots of the knob and spindle, and a key, the slots of the knob and spindle being made to open outwardly and the slot of the follower being made to open inwardly, said key having a contracted portion adapted to engage or enter the followerslot substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

CHRISTIAN BAYER.

Witnesses WM. 0. HAUFF, E. F. KASTENHUBER. 

